Lock.



W. N. THOMAS.

LOCK,

APPLICATION FILED NOV.2I, 1913.

Patented July 27, 1915.

ATTORNEY.

INVENTOR. 27 Mam 7. mama COLUMBIA PLANOGR ran srarns Parana onrro i WILLIAM N. THOMAS, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Application filed November 21, 1913.

To all whom it may concern:

Be it known that I, WILLIAM N. THOMAS, a citizen of the United States, residing in the city and county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates to looks, and more particularly to looks having both a latch bolt and a dead bolt.

The invention contemplates especially the addition of certain parts to the well-known form of rim night latch, but many features of the invention will find application in looks of various types.

The primary objects of the invention are to provide improved means for operating a latch bolt and a dead bolt; to furnish a lock in which a single member, such as a hub of suitable form, is adapted to retract a latch bolt, and to protract and retract a dead bolt; to furnish a construction in which a member for holding the latch bolt retracted serves as an operating member for a dead bolt; to provide a lock in which a retracting hub for a latch bolt is adapted to throw a dead bolt in such a manner as to deadlock the latch bolt; and to improve the general construction and operation of devices of the class to which my invention relates.

To these and otherends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawing, Figure 1 is a front elevation of a rim' lock embodying my improvements. Fig. 2 is a rear elevation of the same, with the back plate removed. the dead bolt being retracted. Fig. 3 is a reverse View of. the lock with respect to Fig. 2, showing the latch bolt retracted. Fig.4 is a view similar to Fig. 2, showing the latch bolt and dead bolt protracted. Fig. 4 is a detail section on line l -45 of Fig. 4:. Fig. 5 is an edge view of Fig. 1. Fig. 6'is a detail of the detent mechanism for the latch bolt. Fig. 7 is a detail of the dead 8 is a detail of the dead bolt tumbler.

I have shown my improvements applied to a lock having a case 10, and latch bolt 11, similar to those of the ordinary rim night latch. The latch bolt 11 has the ordinary parallel shanks 12, one of which is provided with a crosshead 13 cooperating with a re- Specification of Letters Patent.

bolt, and Fig.

Patented an a, 1915.

Serial No. 802.266

tracting hub 14. The hub 14 is adapted to be operated from one side of the door by means of the usual knob 15, turning in the front wall of the case, and from the opposite side of the door by means of key operated mechanism of customary type (not shown). The latch bolt is normally held in protracted position by means of springs 16. It is adapted to be moved into retracted position all aspects of the invention. The dead bolt head, slidable in the groove 21, is indicated at 22, and in case said head is in line with the longitudinal axis of the latch bolt, as

shown, the shank 23 of the dead bolt will be offset slightly from the head 22, so that the gate 24: of said bolt may be engaged by the wing 18 of hub 14. In this manner, the hub 14 is adapted to act as a roll-back for the dead bolt. The latter is provided with a tumbler 25, pivoted in the case on a post 26, and acted on by a spring 27] At its upper edge (Fig. l), the tumbler is provided with a projection 25 presenting notches at opposite sides, which cooperate with the stump 28 of thodead bolt. The upper edge of the tumbler is also provided with a projection 18*. presenting shoulders, which cooperate with the wing 18 of the hub 14.

When the dead bolt is retracted, the parts occupy the positions shown in Fig. 2. On rotation of the hub in a clockwise direction, with reference to Fig. 2, the dead boltwill be protracted in an obvious manner, and the parts will take the positions shown in Fig. 4. The dead bolt'will engage the same opening of the keeper or strike which is engaged by the latch bolt. As the dead bolt 22 reaches its fully protracted position, a shoulder 22 on the shank of the bolt in advance of the gate 24: takes a position immediately behind the crosshead 13. Hence, as the dead bolt is locked against movement by engagement of its stump 28 with the notch in front of the lug 25 the latch bolt will be effectively deadlocked against retraction by an instrument inserted between the edge of the door and the jamb. hen the hub 14: is turned in a counter-cloclnvise direction (Fig. 4), the dead bolt will first be retracted in an obvious manner, after which, on continued movement, the finger 17 of the hub will strike the crosshead l3 and retract the latch bolt. Then, if desired, the latch may be stopped or dogged back by holding it in its innermost position, while the lip 19 of the hub is engaged with the projection 20 on the crosshead. The hub i l is adapted to be moved in either direction by the ordinary pin tumbler lock mechanism (not shown) at the outside of the door as well as by the knob 15 at the inside.

The protraction of the dead bolt, in addition to the deadlocking of the latch bolt, in-

creases to a large extent, the security of the lock, and yet the construction described is very simple and inexpensive. It is of course impossible to gain access to the tumbler 25 from the outside of the door. The security and simplicity of the lock adapt it peculiarly to use on the corridor doors of flats or apartments where the ordinary latch bolt does not give the necessary security.

As previously intimated, it is not always necessary to have the dead bolt head disposed axially with reference to the latch bolt head. Moreover, it is not even necessary, in all aspects of the invention, for the dead bolt or slide to project out of the case.

Various modifications in these and other respects may be adopted within the scope of the invention, as defined in the claims.

WVhat I claim is:

1. In a lock, a latch bolt, a dead bolt, and a rotary member to dog said latch bolt in retracted position, having means to protract and retract said dead bolt; substantially as described.

2. In a lock, a latch bolt, a dead bolt, a hub, and a wing on said hub to operate said dead bolt, and to dog said latch bolt in retracted position; substantially as described.

gate and said tumbler; substantially as described.

4. In a lock, a latch bolt, having a head with a longitudinal groove, a dead bolt movable in said groove, and a single hub for Copies of this patent may be obtained for 5. In a lock, a latch bolt having a head with a longitudinal groove, a dead bolt movable in said groove and having a gate, a tumbler for said dead bolt, and a hub having a finger to retract said latch bolt, and a wing to engage said gate and tumbler and operate said dead bolt; substantially as described.

6. In a lock, a latch bolt having a head with a longitudinal groove, a dead bolt movable in said groove, and a single hub having means to protract and retract said dead bolt and means to dog said latch bolt in retracted position; substantially as described.

7 In a lock, the combination of a'case, a latch bolt therein, said latch bolt having a shank with a crosshead, a sliding memberin the case associated with said latch bolt, said member having a gate and a stump, a tumbler in the case cooperating with said stump, and a hub having awingto engage said gate and said tumbler, and provided with a finger engaging the cro'sshead of the latch bolt; substantially as described.

8. In a lock, the combination of a case, a latch bolt therein, a sliding member associated with the latch bolt and having a gate and a tumbler stump, a tumbler cooperating with said stump, and a hub journaled in one wall of the case and having one part to engage and retract the latch bolt, and another part to cooperate with said gate and tumbler to operate said sliding member; substantially as described.

9. In a lock, the, combination with a case, a latch bolt therein, a sliding member associated with said latch bolt, and having a gate and a tumbler stump, a tumbler cooperating with said stump, a hub journaled in one wall of said case, a finger on said hub to engage and retract the latch bolt, a wing on said hub to cooperate with said gate and tumbler for actuating said sliding member, and means on said hub to dog the latch bolt in retracted position; substantially as described.

In witness whereof, I have hereunto set my hand on the 19th day of November, 1913.

WILLIAM N. THOMAS. Witnesses: I

MABEL A. Bussn, E. T. FrrzsrMoNs.

five cents each, by addressing the Commissioner of Patents,

Washington, I). C. i 

